Arguments

logical: should the displayed addresses of
pointers be set to 0x00000000 before comparison?

Log

logical: should the returned value include a log of
differences found?

Details

The R startup banner and any timing information from R CMD
BATCH are removed from both files, together with lines about
loading packages. UTF-8 fancy quotes (see sQuote) and
on Windows, Windows' so-called ‘smart quotes’, are mapped to
a simple quote. Addresses of environments, compiled bytecode and
other exotic types expressed as hex addresses
(e.g., <environment: 0x12345678>) are mapped to
0x00000000. The files are then compared line-by-line. If
there are the same number of lines and useDiff is false, a
simple diff -b -like display of differences is printed
(which ignores trailing spaces and differences in numbers of
consecutive spaces), otherwise diff -bw is called on the
edited files. (This tries to ignore all differences in whitespace:
note that flag -w is not required by POSIX but is supported
by GNU, Solaris and FreeBSD versions.)

This can compare uncompressed PDF files, ignoring differences in
creation and modification dates.

Mainly for use in examples, text from marker
> ## IGNORE_RDIFF_BEGIN up to (but not including)
> ## IGNORE_RDIFF_END is ignored.

Value

If Log is true, a list with components status (see
below) and out, a character vector of descriptions of
differences, possibly of zero length.

Otherwise, a status indicator, 0L if and only if no differences
were found.